[js] Include npx command to run tests in docs

Author: harsha509

website_and_docs/content/documentation/webdriver/getting_started/using_selenium.en.md

@@ -233,10 +233,18 @@ gradle clean test
 {{% /tab %}}
 {{% tab header="JavaScript" %}}
 
+### Mocha
+
 ```shell
 mocha runningTests.spec.js
 ```
 
+### npx
+
+```shell
+npx mocha runningTests.spec.js
+```
+
 {{% /tab %}}
 {{< tab header="Kotlin" >}}
 {{< badge-code >}}

website_and_docs/content/documentation/webdriver/getting_started/using_selenium.ja.md

@@ -229,10 +229,18 @@ gradle clean test
 {{% /tab %}}
 {{% tab header="JavaScript" %}}
 
+### Mocha
+
 ```shell
 mocha runningTests.spec.js
 ```
 
+### npx
+
+```shell
+npx mocha runningTests.spec.js
+```
+
 {{% /tab %}}
 {{< tab header="Kotlin" >}}
 {{< badge-code >}}

website_and_docs/content/documentation/webdriver/getting_started/using_selenium.pt-br.md

@@ -229,10 +229,18 @@ gradle clean test
 {{% /tab %}}
 {{% tab header="JavaScript" %}}
 
+### Mocha
+
 ```shell
 mocha runningTests.spec.js
 ```
 
+### npx
+
+```shell
+npx mocha runningTests.spec.js
+```
+
 {{% /tab %}}
 {{< tab header="Kotlin" >}}
 {{< badge-code >}}

website_and_docs/content/documentation/webdriver/getting_started/using_selenium.zh-cn.md

@@ -213,10 +213,18 @@ gradle clean test
 {{% /tab %}}
 {{% tab header="JavaScript" %}}
 
+### Mocha
+
 ```shell
 mocha runningTests.spec.js
 ```
 
+### npx
+
+```shell
+npx mocha runningTests.spec.js
+```
+
 {{% /tab %}}
 {{< tab header="Kotlin" >}}
 {{< badge-code >}}